A modern oilman and his Allis-Chalmers W226 power unit

A life on the oil lease

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The Allis-Chalmers W226 power unit that has worked 10 to 12 hours a week for the past 25 years on Don Griffin’s oil lease in northern Pennsylvania. Doing the math reveals total running hours of 13,000 to 15,000. It has never needed any internal repairs, not even a valve job.
Photo by William Klein